Table 1 SABRE cohort characteristics
From: Differences in smoking associated DNA methylation patterns in South Asians and Europeans
| Â | Europeans | South Asians | P-valuea |
|---|---|---|---|
Never smokers | |||
N | 65 | 64 | Â |
Age in years, mean (SD) | 48.5 (4.6) | 48.3 (4.3) | 0.74 |
Former smokers | |||
N | 14 | 10 | Â |
Age in years, mean (SD) | 47.9 (4.2) | 46.6 (4.4) | 0.46 |
Age started smoking in years, mean (SD) | 17.9 (3.6) | 21.5 (6.5) | 0.18 |
Number of cigarettes smoked/day, mean (SD) | 23 (12) | 13 (9) | 2.5 × 10-2 |
Pack years, mean (SD) | 19.9 (14.0) | 10.5 (9.9) | 8.1 × 10-2 |
Time since quitting in years, mean (SD) | 12.9 (7.9) | 12.1 (8.0) | 0.82 |
Current smokers | |||
N | 16 | 20 | Â |
Age in years, mean (SD) | 46.9 (3.9) | 47.8 (4.3) | 0.53 |
Age started smoking in years, mean (SD) | 17.9 (4.8) | 22.3 (5.8) | 2.2 × 10-2 |
Number of cigarettes smoked/day, mean (SD) | 23 (9) | 13 (6) | 1.0 × 10-3 |
Pack years, mean (SD) | 34.8 (19.3) | 17.8 (9.9) | 4.5 × 10-3 |